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Media Type
1,702
texts
233
movies
116
images
85
audio
13
software
5
data
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Availability
2,133
Always Available
19
Available to Borrow
2
Waitlist
Topics & Subjects
435
carrier
320
NASA Technical Reports Server (NTRS)
200
DTIC Archive
165
frequency
146
bell system
143
signal
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Creator
320
nasa technical reports server (ntrs)
200
defense technical information center
31
nasa armstrong flight research center
24
u.s. navy. bureau of medicine and surgery
22
joe scherrman
16
nasa
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Language
1,759
English
62
French
4
English with Portuguese subtitles
3
Portuguese
2
Handwritten English
2
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